Howaed l



(No Model.) .H' L THEM- BOLSTER-PLATVB Poe'vemennej 7 No. 270,265.Patented Jan. 9,1883.

N. Puma Phcwumo n hen Washington. DC.

UNITED STATES PATENT OFFICE.

HOiVARD L. TREMAN, OF HECTOR, NEW YOBK.

B'OLSTER-PLATE FOR VEHICLES.

SPECIFICATION formingpart of Letters Patent No. 270,265, dated January9, 1883.

Application filed October 25, 1882. (No model.)

To all whom it may concern Be it known that I, HOWARD LA FAYETTE TREMAN,of Hector, Schuyler county, New York, (with post-office at Mecklenburg,same 5 town and county,) have invented an Improved Bolster-Plate forVehicles, of which the following is a specification, reference beingmade to the accompanying drawings.

My object is to make a bolster-plate having great freedom of motionabout the king-bolt, for especial use in heavy wagons and in siei'ghs;and the nature of my invention will be apparent as I describe the plate.

Figure l is a side elevation of the two parts of the plate. Fig. 2 is alongitudinal section perpendicularly through the center of the upperhalt of the plate. tion through the lower half or part of the plate.Fig. 4 is another form ofthe king-bolt, shown by longitudinal section.Fig. 5 is a view looking down on the lower half or part of the plate,-showing its shape and rendering the other figures clearer.

In the figures, a is the upper half or part of the plate, shaped as seenin Fig. 5, and is a plain piece of metal made with an inverted circularcup-cavity, a, beneath the plain part of it. It has three aperturesthrough it-one at each end-by which it is bolted to the bolster, andanother, a, for the king-bolt; and b is the lower half or part of theplate, made similarly to the-part a, and with the same number ofapertures, except that instead of a cup circular cavity it has acircular knob or stud, 0,

that fits into the cup-cavity of the upper part. An aperture, 0, is madethrough thestud c, which is shaped as seen in Fig. 3-that is, it isfunnel-shaped, with a neck, 0', at its lower 40 portion. In theapertures a and 0 there is placed a king-bolt, d, which is shown in Fig.l to have a head on' the top of the plate a, and -to reach through thefunnel part of the aperture 0 to fit the neck 0', and have a burr, e, on

' 5 its lower end. This burr hasits upper surface beveled or circular,as shown in Fig. 1. The dotted lines show the extent of motion that theplates have-those-ot' Fig. l,f that of the beveled burr c and funneledapertpre a. By

a knob moving in a circular cup or cavity with Fig. 3 is the samesecbolt (1 is in the apertures 01. and c, and the head d of theking-bolt d is in the cavity 13 ot' the' stud c of that figure, thebolt-head d be ing circular on its upper part and fitting into thehalf-circular cavity 13, as shown in section.

The funnel shape of the aperture a is truncated or cut down, so as toleave only the top portion of whatis seen in section in Fig. By thisconstruction the same half-ball and half-ball socket is used as in Figs.1, 2, and 3; but the central pivot-point of the king-bolt is raised fromthe neck 0 of Fig. 3 to a point indicated by a small black dot justabove the letter d(, Fig. 4, which dot is marked j, Fig.

l-. The advantage is that in Fig. 1. the motion vertically of theball-and-socket joint of the plates is limited by the bolt and by'thenear ness to each other of the plates; but in Fig. 4 the motion of thejoint vertically is limited notat-all practically by the king-bolt, andonly by the shape of the stud o and the nearness of the plates a and b,0r,in other words, is greater. It were easy to make figures showingother forms of sockets to and of studs 0 in, extension of this sameprin.clpleas, fouexample, on

with a more complete ball and socket.

The advantages and uses of my invention are apparent.

I claim l. Ball'and-socket-joint plates for vehicles, constructed by theplates at and b with kingbolt d, the ball-surface of the stud c fittinginto the cavity a, and there being a funnelexcavation in the stud aboutthe king-bolt, as shown and described.

2; The half-ball stud c, fitting into the cavity a, the stud having anexcavation, t', in which thekiug-holt head is fitted, and the truncated.

funnel-excavation c, as shown and described.

HOWARD LA FAYETTE TREMAN. Witnesses:

S. J. PARKER, WM. J. TOTTEN.

